Is it possible to import a Maya file into blender?
Not directly (since the ma .. mb formats are closed or licensed I think? don't quote me), but you can export your model from Maya to a universal format that Blender supports such as .abc, .fbx, .dae or .obj and then import into Blender using the File > Import menu. Use either of the first two if you have an armature and .fbx preferably if you have animation data.